Machine for making brackets for telegraph-insulators



3 Sheets---Sheets'lI (No Model.)

J. B. SMITH. VMAmsrINE PoR MAKING BRAGKETS PoR TBLBGRAPH INsULAToRs. N o. 278.618.

'Patented May 29,1383.

` ATTORNEYS.

(No Model.) 3 Sheets-Sheet 2.

J.B.SM1TH MACHINE FOR MAKING BRAGKETS EUR TELEGRAPH INSULATORS.

No: mms, Patented May 29,1883f :Q u n *x o N Q@ "g1 tu N l, q ANN N! NI @e 19?- y r ,yb 'IN14 l I JW l" r i' HLM i N1 EN vh/NIM H 5 mi In ,H N N E l j I 'u 1- y ------r|Y M I 1f-3:5855 I M@ ATTORNEYS.

(N9 Model.) 3 Sheets--Sheet 3. J. B. SMITH.

. MACHINE FOR MAKING BRAGKETS FOR TBLBGRAPH INSULAJJORSl` I agreg WITNESSES: i

ATTORNEYS.

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To all whom it may concern UNITED `STATES PATENT @Farma -JOHN B.

SMITH, on sUNArEE, Assrenoa frooHAnLns-N. FREEMANAND DAVID W. ONEIL, on oLAREMoNn New HAMPsHiRE.

i i MACHlNEl-OR MAKING BRACKETS `FOR TELEGRAPH-INSULAVTURS.

SPECIFICATION forming partei Letters Patent No. 278,618, dated May 22,1883,

` Application led September Q. 1882. (No model.) n

Be itknown that LJOHN B. simmer sanal pee, in the county of Sullivan and State of New Hampshire, have invented a new and Improved Machine forMaking Brackets for Telel graph-Insulators; and I do hereby declare that the followingis a full, clear, and exact descrip, tion of the same, reference being had to the accompanying drawings, forming part specification, `in which- Figure l is a perspective view of the entire machine.

Fig. 3 shows adetail view which two brackets are formed, the dotted lines indicating the general outline of the the central parts of the machine.

' The object of my invention is to.provide a Amachine for making wooden brackets for teleturn the sameinto shape.

l will first describe the means for feeding more fully described. l

In the drawings, Arepresents the main frame-s graph-insulators; and to thisendit consists in a novel organization' ot parts for holding the blank and simultaneously turning its two ends to form two brackets, as will be hereinafter work, upon which are mounted devices for feed ing and holding the blank while its ends are being turned, `and. V'also two independently-rotatin g mandrels having a reciprocating motion and bearing funnel-shaped cutter-heads, which are advanced upon the ends of the blank'to and holding the blank in the line of-the cutterheads. 4

B is a guide-frame arranged about the Vmiddle of the frame A, ontop of the same, and in transverse relation thereto. In grooves in this gnide-fraine is arranged the sliding feed-table C,- which reciprocates transversely to the main frame. On this table are arranged two raised bars or projecting` lugs, a a, Vwhose shoulders or ends next to the cutter-heads are arranged upon a diagonal line. For` giving a reciprocating motion to this table a connecting-rod, D, Fig. 1, is jointedat one end to the lower side of the same, and at the other end isjoin ted of this Fig. 2 is anelevation of the rear` side of the same. 'of a completed bracket.

` Fig. 4 shows a detail, view of the blank or piece of material from to a vertical lever, E, fulcrumed in 'the middle to an offset from the main frame. The lower end of this lever is jointed to a horizontal con-l necting-rod, F, which is `jointed to the lower end of a lever, G, Fig. 5, fulcrnmed at its up` per end to the frame A, and having nearl its middle a pinor friction-relleno, that traverses a cam-groove, o, in the cam-plate H. This camplate lis rigidly attached to a revolving horizontal shaft, I, arranged longitudinally with frame A in bearings upon the side thereof. This shaft is provided with a gear-wheel, J, Fig. 2,' which receives motion from a pinion, K,on a short shaft, L, upon which short shaft is also arranged a driving-pulley, to which motion may be `communicated by a lbelt for the purpose ofgiving a slow rotation to the long shaft I, and when the latter is rotated it iml parts,lthrough the cam-plate H, lever G, connecting-rod F, lever E, and connecting-rod D, a reciprocating motion to the feed-table.

Just above the feed-table, and in the vertical line ofthe cutter-heads, is aT-shaped clamp, U,

Fig. 6,` whose head-piece'is set slightly diago nal to the axial line of the cutters, for the purpose `hereinafter described, and which headpiece has .downwardlylprojeoting4 stops d d. The shank portion of 'the T-shaped clamp is rigidly keyed tofa-rock-shaft, M, held in bearings in upright supports N N from the main frame. This rock-shaft is provided with a crank-arm, yO, Fig. l, one end of which is connected to a vertical rod, P, which at its lower end is jointed to the middle ot' a horizontal lever, Q; This lever` Q is fulcrumed at one end upon an upright support, R, rising from the lower portion of the main frame, and

at its other end it rests beneath a cam, S, Fig.

2, on the longitudinal shaft I, being held up to engagement with said cam by a spring, T,

`so that as this shaft I revolves it imparts a rocking motion to shaft M, and the clamp U is made to oscillate therewith, moving down at the `proper time to hold theblank while being turned, and rising therefrom to release it l when finished.

lThe devices for 'turning the ends of the blank consist4 ot' two funnel-shaped cutterheads, e e, having knives arranged after the manner of the ordinary pencil-Sharpener. These cutter-heads are arranged an equal dis- IOS tance from the feed-table, on each side of the same, and they have both a rotary and a rightline movement. Both being geared precisely alike, it will only be necessary to describe the connections of one ofthem. Each cutter-head is located on the inner end of a revolving shaft,f,.provided with a drive-pnlleyg. This shaft isjournaled in a met-al frame, i, Figs. 1 and 2, arranged upon the top of frame A, and swivels at one end' i-n a head,j, to the lower portion of which is attached a sliding guiderod, lc, arranged in parallel position beneath the shaft f, and sliding in bearings in the frame t'.

To the head j, which forms the bearing for the outer end of the revolving shaft, is liointed the upper end of a lever, V, fulcrnmed at its bottom to the end of the machine, and having about its middle a roller, Z, that enters a cam groove, lm, in a cam-plate, W. This cam-plate is fixed on a short transverse shaft, X, at the end of the machine which is connected to the longitudinal shaft l, and derives motion therefrom through the bevel-gears n. This camplate, withits cam'groove, then, it will be seen, serves to impart to the revolving shaft bearing the cutter-head a longitudinal reciprocating movement, bringing each cutter-head against the end of the blank, and then withdrawing it, the curve of the cam-'grooves being such that said cutter-heads are gradually projected toward the blank, then quickly withdrawn, and then, after an interval of rest to permit the turned blank to be removed, are again moved forward for a repetition ofthe action.

For giving rotary motion to the revolving cutter-heads, the pulleys g are belted to drums Y Y on lower horizontal shafts,Z Z', on which are drive-pulleysp p', which are belted to any suitable driving mechanism, thc drums having a periphery wide enough to accommodate the belt inthe lateral movement ofthe pulley g. Two separateshafts,Z Z', with pulleys and drums, are here employed for the purpose of giving to the cutter-heads an opposite revolution, so that the cutting strainof one shall neutralize the cutting strain of the other, and the blank will not be so liable to become twisted or displaced. On each side of the feed-table are gage-strips o r, which serve to adjust the position ot' the blank on the table.

The operation of the machine is as follows: A block or blank of the form shown in Fig. 4 is placed upon the feed-table in front ot' the lugs or bars a a. The machine then being in opera-tion and the parts properly timed, the feed-table advances and simultaneously the clamping-bar U descends. .As soon as the blank is in the line of vthe cutter-heads it strikes the stops d d of the clampingbar, and

simultaneously the clamping -bari bears upon I the top of the blank and holds it lrm. Then the cutter -heads advance upon the ends of the blank, and, rotating in opposite direction, turn oli' the portion marked 22 in Fig. 4, leav-r ing the blank in condition to form two brackets by being divided through the diagonal dotted line, forming two brackets of the general shape shown vin Fig. 3, upon which a screwthread is afterward cut. The cutter-heads, after4 having done their work, retire quickly, and pause a moment while the turned blank is beingdislodged and a new one inserted7 after which the same action takes place.

In order to maketwo brackets ut of the piece shown in Fig. 4, it is necessary that the' blank should be-turned off at its ends more uponV one side than it is upon the other, as' at 2 2, and for this purpose the blank mustA not be placed exactly in the line ofthe axis ofthe cutters,but somewhatobliquelythereto, hence will be seen the necessity for arranging the `lugs a a and the stops el d with their faces obliquely to the said axis ofthe cutter-heads.

Havingthus described my invention, what I ter-heads, the reciprocating table having lugs Y a a, and the oscillating clamping-bar U, having stops d d, of the rock-shaft M, having arm O, rod P, lever' Q, cam S, spring T, and main shaft I, as and for the purpose described.

4. A machine for turning brackets for insulators, consisting of a reciprocating table with lugs a a, and clamping-bar with stops d d, arranged substantially as described,for feeding and holding the blank in an inclined position, combined with two reciprocating cutter-heads rotating in opposite directions and acting simultaneously upon opposite ends of the blank IOO IIO

to neutralize the cutting strain, as described. v

5. The feed-table having lugs a a, and the clamp having stops d d, both said lugs and stops being arranged with their faces in aline diagonal to the'cutter-head axis, and combined with said cutter-head, substantially as shown and described/` JOHN B. SMITH.

Witnesses HERBERT BAILEY, DAVID W. ONEIL. 

